Density functional theory combined with quasi-harmonic Debye model is applied to research structural, mechanical and thermodynamic properties of zirconium boride (ZrB) with B1 structure. The structural properties of equilibrium are calculated and compared with other available experimental and th...

Zirconium boride reinforced NbMo-matrix composites with composition of 42.5%Nb+42.5%Mo+15%ZrB2 (vol%) and 42.5%Nb+42.5%Mo+10.5%ZrB2+4.5% SiC (vol%) were fabricated by hot-pressing under an uniaxial load of 30 MPa at 1600 °C in Ar atmosphere with holding time of 1 h and 2 h. The microstructure a...

A stable zirconium boride monolayer with the chemical formula of ZrB4 has been identified by using the first-principles calculations. It has a planar structure by extending the Zr-hexagon, which is formed by jointing three ZrB4 unit cells. The novel ZrB4 monolayer has sound thermodynamic, kineti...

This study proposes a new additive manufacturing (AM) based methodology to fabricate periodic metal matrix composite architectures, with a focus on titanium (Ti)-titanium boride whisker (TiBw) composites. The manufacturing method includes binder jetting AM of the titanium matrix reinforced perio...

In this study, the plasma paste boriding (PPB) was applied in order to produce the boride layers on commercially pure titanium (Cp-Ti). PPB process was carried out in 50% H2–50% Ar atmosphere under a reduced pressure at various parameters (temperature and duration). The boride layers consisted ...

In this work, a detailed characterisation of titanium–titanium boride composites processed by three powder metallurgy techniques, namely, hot isostatic pressing, spark plasma sintering and vacuum sintering, was conducted. Two composites with different volume percents of titanium boride reinforc...

Fretting corrosion of boride coated commercially pure titanium (CpTi) is investigated in Ringer's solution using open circuit potential (OCP) method. Coating is synthesized at 850, 910 and 1050 °C for 1, 3 and 5 h. Upon fretting, borided specimens exhibited lower galvanic coupling than bar...

In this work, TB2 alloy was successfully borided by pack boriding at the temperature range of 950–1100 °C for 5, 10, 20 and 30 h. The characteristics of boride layers were examined by X-ray diffraction, scanning electron microscopy, wavelength dispersive spectrometer, microhardness tester and ...

The present study is focused on the estimation of activation energy of boron in the plasma paste borided Ti6Al4V alloy, which is extensively used in technological applications, using an analytical diffusion model. Titanium boride layers were successfully produced by plasma paste boriding method ...

Variations in glass transition temperature, onset of crystallization, thermal expansion coefficient, density and molar volume with B2O3 concentration were studied in a series of xB2O3–(100 − x)Ba(PO3)2 glasses with 0–10 mol% B2O3. DTA analysis and isothermal treatments for powdered glass sampl...

The low frequency vibrational spectra (Raman and IR) of crystalline metaborates Ba2MII(B3O6)2 (MII  Mg, Ca, Ni, Co, Cd) are interpreted on the basis of a factor group analysis and with the help of 24Mg26Mg and 40Ca44Ca isotopic shifts. The far-IR spectra of the glasses appear as the envelo...

The anisotropic elastic and thermal expansions of the titanium borides (TiB2, Ti3B4, TiB_Pnma and TiB_Fm3¯m) are calculated from first-principles using density functional theory. All borides show different anisotropic elastic properties; the bulk, shear and Young’s moduli are consistent with t...

In this work, the boronizing of Fe–Mn binary alloys at 0.42, 0.76 and 0.94 wt.% Mn was carried out in a solid medium using the powder pack method. In this method, commercial Ekabor-II boron source and activator (ferro-silicon) were thoroughly mixed to form the boriding medium. The samples were ...

Boriding has attracted great interests in improving mechanical performance of materials. The high processing temperature and the relatively thin boride layer, however, have limited its applications. Here we report a method to boronize high-carbon steels at a relatively low temperature (780 °C)....

Ternary catalyst Cobalt–Manganese–Boride (Co–Mn–B) has been synthesized with chemical co-precipitation followed by calcination at various temperatures. The effects of heat-treatment temperature on the catalytic activity toward hydrolysis of alkaline NaBH4 solution have been comparatively inv...

In this study, an alternative surface hardening method called as “CRTD-Bor” (Cathodic Reduction and Thermal Diffusion based Boriding) was introduced for the heavy-duty applications of medium carbon, chromium-silicon martensitic steel, also known commercially Silchrome 1. The influences of proc...

Higher boron concentration is generally recognized as the most direct method to improve the hardness of transition metal borides. Here, we report the synthesis of manganese tetraboride, a recently proposed superhard candidate, by high pressure and high temperature solid state reaction. Hardness ...

Boride layer characterization and dry sliding wear behaviors of borided H13 steel at different durations and temperatures with nanoboron powder have been investigated. A single phase boride layer was formed at 800 °C and a double phase boride layer was obtained at 900 °C and 1000 °C. Accordin...

Face centred cubic (fcc) phase high-entropy alloys (HEA) exhibit a higher ductility compared to body centred cubic (bcc) phase or multiphase HEA systems. However, low hardness and low wear resistance prevent tribological applications. A precipitation hardening of the fcc phase CoCrFeMnNi and the...

Arsenic (As) mobilization in soils is a fundamental step controlling its transport and fate, especially in the presence of the co-existing components. In this study, the effect of two commonly used herbicides, glyphosate (PMG) and dicamba, and two competing ions including phosphate and humic aci...